Funding for this research was provided by:
the Shanghai Municipal Commission of Health and Family Planning (ZY3-LCPT-1-1010, 20174Y0038)
the Science and Technology Commission of Shanghai Municipal (17ZR1428100)
the Youth Science and Technology Talent Yang-fan Project of Shanghai (17YF1417800)
Received: 13 May 2019
Accepted: 8 January 2020
First Online: 23 January 2020
Ethics approval and consent to participate
: The central ethical approval was obtained from the Ethics Committee of the Shanghai Municipal Hospital of Traditional Chinese Medicine (approval no. 2017SHL-KY-14) and we will not begin recruiting at other centres in the trial until local ethical approval has been obtained. All participants will provide written informed consent before enrolment.
: Not applicable.
: The authors declare that they have no competing interests.